diff options
Diffstat (limited to 'gnulib/lib/open.c')
| -rw-r--r-- | gnulib/lib/open.c | 34 |
1 files changed, 31 insertions, 3 deletions
diff --git a/gnulib/lib/open.c b/gnulib/lib/open.c index 326e6d15..08ecaff4 100644 --- a/gnulib/lib/open.c +++ b/gnulib/lib/open.c @@ -38,6 +38,11 @@ orig_open (const char *filename, int flags, mode_t mode) #include <string.h> #include <sys/types.h> #include <sys/stat.h> +#include <unistd.h> + +#ifndef REPLACE_OPEN_DIRECTORY +# define REPLACE_OPEN_DIRECTORY 0 +#endif int open (const char *filename, int flags, ...) @@ -98,6 +103,29 @@ open (const char *filename, int flags, ...) fd = orig_open (filename, flags, mode); +#if REPLACE_FCHDIR + /* Implementing fchdir and fdopendir requires the ability to open a + directory file descriptor. If open doesn't support that (as on + mingw), we use a dummy file that behaves the same as directories + on Linux (ie. always reports EOF on attempts to read()), and + override fstat() in fchdir.c to hide the fact that we have a + dummy. */ + if (REPLACE_OPEN_DIRECTORY && fd < 0 && errno == EACCES + && (mode & O_ACCMODE) == O_RDONLY) + { + struct stat statbuf; + if (stat (filename, &statbuf) == 0 && S_ISDIR (statbuf.st_mode)) + { + /* Maximum recursion depth of 1. */ + fd = open ("/dev/null", flags, mode); + if (0 <= fd) + fd = _gl_register_fd (fd, filename); + } + else + errno = EACCES; + } +#endif + #if OPEN_TRAILING_SLASH_BUG /* If the filename ends in a slash and fd does not refer to a directory, then fail. @@ -128,9 +156,9 @@ open (const char *filename, int flags, ...) } #endif -#ifdef FCHDIR_REPLACEMENT - if (fd >= 0) - _gl_register_fd (fd, filename); +#if REPLACE_FCHDIR + if (!REPLACE_OPEN_DIRECTORY && 0 <= fd) + fd = _gl_register_fd (fd, filename); #endif return fd; |